Lago Jeinemeni sits within one of the most remote and spectacular corners of Chilean Patagonia, nestled in the Aysén del General Carlos Ibáñez del Campo Region. Part of the broader Jeinimeni area that now falls under the expanded Patagonia National Park — which has annexed the former Lago Jeinimeni National Reserve — this lake and its surrounding watershed represent some of the last truly wild trout water in South America. The landscape is defined by dramatic Andean peaks, Valdivian temperate rainforest with dense fern and bamboo understories, and a rich mosaic of wetlands and open steppe that supports an extraordinary diversity of wildlife. The lake drains into the Jeinimeni River, which flows toward Lago General Carrera, the second-largest freshwater lake in South America, making this entire system a connected and ecologically significant fishery.